<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">
        <div>{{username}}</div>
        <input type="text" v-model="username">
    </div>
</body>
<!-- <script src="https://cdn.bootcdn.net/ajax/libs/vue/0.10.0/vue.min.js"></script> -->
<script src="./lib/vue.js"></script>
<script>
    const app=new Vue({
        el:'#app',
        data:{
            username:'苏七'
        }
    })
</script>
</html>